<template>
  <div class="login-container">
    <!-- 导航栏 -->
    <van-nav-bar class="page-nav-bar" title="登录">
      <van-icon name="arrow-left" slot='left' class='left-icon' @click='$router.go(-1)' />
    </van-nav-bar>
    <!-- /导航栏 -->

    <!-- 登录表单 -->
    <van-form @submit="onSubmit" ref=' loginForm'>
      <van-field name="mobile" placeholder="请输入手机号" v-model='user.mobile' :rules='userFormRules.mobile' maxlength="11">
        <i slot="left-icon" class="icon icon-shouji"></i>
      </van-field>
      <van-field type="number" name="code" placeholder="请输入验证码" v-model='user.code' :rules='userFormRules.code'
        maxlength="6">
        <i slot="left-icon" class="icon icon-yanzhengma"></i>
        <template #button>
          <van-count-down :time="1000 *60" v-if='isCountDownShow' format="ss s" @finish='isCountDownShow = false' />
          <van-button native-type="button" class="send-sms-btn" v-else size="mini" round type="default"
            @click=' onSendSms'>
            发送验证码
          </van-button>
        </template>
      </van-field>
      <div class="login-btn-wrap">
        <van-button class="login-btn" block type="info" native-type="submit">
          登录
        </van-button>
      </div>
    </van-form>
    <!-- /登录表单 -->
  </div>
</template>

<script>
import { login, getSmsCode } from '@/api/user.js'
export default {
  name: 'LoginIndex',
  components: {},
  props: {},
  data () {
    return {
      // 倒计时是否显示
      isCountDownShow: false,
      // 手机号验证码校验
      userFormRules: {
        mobile: [{
          required: true, message: '手机号不能为空'
        }, {
          pattern: /^1[3|5|7|8]\d{9}$/,
          message: '手机号格式错误'
        }],
        code: [{
          required: true, message: '验证码不能为空'
        }, {
          pattern: /^\d{6}$/,
          message: '验证码格式错误'
        }]
      },
      // 手机号验证码双向数据绑定
      user: {
        mobile: '18911111111',
        code: '246810'
      }
    }
  },
  computed: {},
  watch: {},
  created () { },
  mounted () { },
  methods: {
    // 点击验证码按钮
    async onSendSms () {
      // 进行校验
      try {
        await this.$refs.loginForm.validate('mobile')
      } catch (err) {
        return console.log('验证失败', err)
      }
      try {
        await getSmsCode(this.user.mobile)
        // 验证成功，开启倒计时
        this.isCountDownShow = true
      } catch (err) {
        // 发送失败关闭倒计时
        if (err.response.status === 429) {
          this.$toast('发送太频繁了，请稍后重试')
        } else {
          this.$toast('发送失败，请稍后重试')
        }
      }
    },
    // 表单提交事件
    async onSubmit () {
      // 先加载loading
      this.$toast.loading({
        message: '登录中...',
        forbidClick: true, // 禁用背景点击
        duration: 0 // 持续时间，默认 2000，0 表示持续展示不关闭
      })
      try {
        const res = await login(this.user)
        // 请求成功保存数据到本地
        this.$store.commit('setUser', res.data.data)
        this.$toast.success('登陆成功！')
        this.$router.push('/my')
        console.log(res.data.data)
      } catch (err) {
        // 请求失败status为400提示对应信息
        if (err.response.status === 400) {
          this.$toast.fail('手机号或验证码错误')
        } else {
          // 不是400就提示别的
          this.$toast.fail('登录失败，请稍后重试')
        }
      }
    }
  }
}
</script>

<style scoped lang="less">
.login-container {
  .left-icon {
    color: #fff;
  }
  .icon {
    font-size: 37px;
  }
  .send-sms-btn {
    width: 152px;
    height: 46px;
    line-height: 46px;
    background-color: #ededed;
    font-size: 22px;
    color: #666;
  }
  .login-btn-wrap {
    padding: 53px 33px;
    .login-btn {
      background-color: #6db4fb;
      border: none;
    }
  }
}
</style>
